Chapter 10 Deployment CPU 21xSER-2 Manual VIPA CPU 21x
10-2 HB103E - Rev. 05/45
Principles
The CPU 21x-2BS02 provide serial interfacing facilities between the
processes of different source and destination systems. The CPU has got 2
serial RS232C interfaces.
The communication happens via handling blocks that are stored in the
CPU as library.
The CPU 21x supports the ASCII, STX/ETX, 3964(R) and RK512
protocols.
For the parameter transfer to the communication processor (CP), you have
to execute SEND (SFC 230) with order no. 201 during runtime. For this you
store the parameters in a DB where the structure depends on the wanted
protocol.
To activate the parameters, you execute a RESET (SFC 234) with order
no. 0 after the SEND.
Note!
Please regard that the commands SEND, RECEIVE, FETCH and RESET
require a preceding "VKE"=1 otherwise they are not executed.
The internal CP of the CPU 21x-2BS02 is directly connected to the CPU
portion via a Dual-Port-RAM, also called "page frame". This page frame is
available at the CPU section as standard CP interface. The data transfer
happens via the standard handling blocks (SEND, RECEIVE and FETCH).
The communication via the according protocols is controlled by connection
commands that are programmed in the user application.
The following SFCs are deployed:
SFC Name Description
SFC 230 Send Send via page frame (page frame comm.)
SFC 231 Receive Receive via page frame (page frame comm.)
SFC 232 Fetch Fetch via page frame (page frame comm.)
SFC 233 Control Control for page frame communication
SFC 234 Reset Reset for page frame communication
SFC 235 Synchron Synchron for page frame communication
SFC 236 Send_All Send_All via page frame (page frame comm.)
SFC 237 Recv_All Receive_All via page frame (page frame com.)
SFC 238 Control1 Control for page frame communication
with Type ANZW: pointer and parameter IND.
General
Protocols
Parameterization
Communication
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